t of Gaul came to be that of the P rather than the QU type, owing to the influx from the East and Northeast of an overflow from the Rhine valley of tribes speaking that dialect; a dialect which, by force of conquest and culture, tended to spread farther and farther West. Into Britain, too, as time went on, the P type of Celtic was carried, and has survived in Welsh and Cornish, the remnants of the tongue of ancient Britain. We know, too, from the name Eporedia (Yvrea), that this dialect of Celtic must have spread into Cisalpine Gaul. The latter district may have received its first Celtic invaders direct from the Danube valley, as M. Alexandre Bertrand held, but it would be rash to assume that all its invaders came from that direction. In connection, however, with the history of Celtic religion it is not the spread of the varying types of Celtic dialect that is important, but the changes in the civilisation of Gaul and Britain, which reacted on religious ideas or which introduced new factors into the religious